<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        // 1 5 6 8 7  /   2 3 4
console.log(1)

setTimeout(function () {  // h1 
  console.log(2) 
  new Promise(function (resolve) {
    console.log(3)
    resolve()
  }).then(function () {
    console.log(4)
  })
})

const p = new Promise((resolve, reject) => {
  console.log(5)
  resolve() // 标记为成功
  console.log(6)
})

p.then(data => {
  console.log(7) // w1 
})

console.log(8)
    </script>
</body>
</html>